单项选择题

Wben the error is small, the statistical principles used in dealing with it are （） when the error is big.

A．simpler than
B．more difficult than
C．not yet understood
D．the same as

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单项选择题
How often is physical science more accurate than biological science（）

A．Never.
B．Always.
C．Usually.
D．Occasionally.
单项选择题
What do statistics do for science（）

A．They get rid of intuition,
B．They make it more logical.
C．They reduce everything to numbers.
D．They give an idea of the amount of error involved.
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